单项选择题

My pain ____________apparent the moment I walked into the room, for the first man I met asked sympathetically:" Are you feeling all right"

A． must be
B．had been
C．must have been
D．had to be
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单项选择题
A safety analysis ____________the target as a potential danger. Unfortunately, it was never done.
A．would identify
B．will identify
C．would have identified
D．will have identified
单项选择题
Generally speaking, the bird flying (across) our path is observed; and (the one) staying on the tree near (at hand) is passed by without any notice (taking) of it.
A．across
B．the one
C．at hand
D．taking
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